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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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07/08/19

Message Overview:

Message Name:

FCU INTERNAL FAULT

Message Code:

B3-006677

Associated CAS:

FLAPS FAIL
(Caution)

Reporting LRU: FLAP CTRL UNIT
System Description: 27-52-00
Schematic Diagram: 27-52-00
Wiring Diagram: 27-52-45

Message Description:

Internal failure of the Flap Control Unit.

Possible Causes:

  • Flap Control Unit (FCU) (A124)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-27-0058 - Flap Control Unit - CAS Messages Reset procedure (20501 - 20999)

Forum Articles/Infoservice/Newsletter: None

If Flap Control Unit (FCU) PN: 2257A0000-02 is installed, the reset procedure included in AW300-27-0058 may clear the fault.

Quick Links:

Removal of the Flap Control Unit (FCU) AMM 27-51-05-000-801
Installation of the Flap Control Unit (FCU) AMM 27-51-05-400-801
Operational Test of the Flap Control Unit (FCU) AMM 27-51-05-710-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. Reset the following circuit breakers.

    FLAP R IND CB2-B12
    FLAP L IND CB1-B13
    FLAP CTRL CB1-B14

  2. Reset the FCU by pressing the FCU reset button on the MAINTENANCE TEST control-panel.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  3. Replace FCU.
  4. Do close out.

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